- mangy
- manifest
- manipulate
- margin
- marinate
- market
- market rate
- mason's rule
- mass
- mass media
- massive
- master
- masterpiece
- mat for sleeping
- matter of record
- matzo
- mazily
- mb
- mechanistic
- meddlesome
- mediation
- medicaid
- meditative
- medom
- meek
- meet
- memento
- memorable
- memorandum
- memorialise
- memorised
- memorising
- mendacious
- merchant chief
- merciless
- mercy
- meretricious
- merge
- merino
- merlin
- mesentery
- miasmatic
- miasmic, miasmal
- middle-manship
- midnight
- midsummer
- mightily
- militant
- militarize
- millennial
- miller
- millinery
- milnea
- mincing
- mind
- miracle
- miraculous
- mirror
- misandry
- misapprehensive
- misbehaviour
- miscarriage
- miscellaneousness
- misinterpret
- misleading
- mismanage
- miso
- misplaced
- mispronunciation
- misrule
- mixed metaphor
- mlechcha
- mobility
- mocha
- mollify
- momentous
- monastery
- monastic
- monobrow
- monocratie
- monomania
- monomaniacal
- monophonemics
- monopolistic
- monosepalous
- monotheist
- moplah jaggers
- moral advice
- moral fibre
- morbid
- mother-in-law
- motley
- mottled
- mould
- mow someone down, mow something down
- much
- much to seek
- mucky
- muddy
- musk-deer